Blæser med RPM feedback

Relativt til minus, så du skal indskyde "noget" i plusledningen. Brug dioder, det gør at du får bedre startmoment, evt. med en 1000uF i parallel med dioderne. 5-8 1N400x vil være passende.

2006-08-19 Ole Geisler wrote

Min tanke var at lave en aktiv temperaturregulering. Som også havde en eller anden "sikker start" funktion. Min ide gik på at bruge denne feedback ting til at lade kredsløbet give max spænding hvis blæseren står stille.

Det må kunne klares med et par transistorer og lidt diskrete komponenter.

/Morten %-)

Hej Morten

Medmindre du selv vil lave en temperaturregulering, kan du købe en færdig - skæv til overclockere:

Temperaturregulering med temperaturudlæsning:

"T-Balancer Intelligent Fan Controller TBAN-SL4" Joe Citarella - 12/21/04

Citat: "...Right off the bat, be assured that this is NOT a simple rheostat fan controller - it's far more than that (Data Sheet HERE.)..."

The T-Balancer offers numerous features to ensure an optimal performance, security and silent operation of the PCs and Servers:

Super de Luxe med "overliggende knastaksler":

The T-Balancer bigNG:

Citat: "... The T-Balancer bigNG is the first 4-channel controller for air and watercooling with patented Dual Mode Technology (DMT). You can choose whether you want to power each channel analog or with PWM. The T-Balancer bigNG delivers pure analog voltage up to 20W per channel (40W with PWM). This way you can even connect water pumps or Peltiers. ... The bigNG will be delivered by standard with 4 thin analogue sensors and

2 precise digital sensors. Due to the high absolute accuracy of the digital sensors you can calibrate the rest of your system to it. Using all available extension you can control all together 10 analogue sensors, 8 digital sensors and 2 flowmeters. ..."

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Gør-det-selv

simpel:

Bruger individuel temperaturstyring, men checker ikke blæsernes signaler: Fan speed controller:

Citat: "... After some bad experiences with commercial fan speed controllers in the PCs in my home, I decided it would be easy to build a better one myself. Indeed, after a few evenings, I obtained these results..."

2/16/2006, Use a PWM fan controller in an EMI-susceptible circuit. Control it with either an external negative-temperature-coefficient thermistor or a PIC microcontroller and its SMBus serial-data bus.

Kilder: 1. "Fan Speed Controller and Fan Fault Detector Family," Microchip Technology Inc, 2002,

2. SMBus PWM Fan Speed Controllers with Fan Fault Detection, Microchip Technology Inc, 2003,

/Glenn